(unnamed)

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(unnamed) flows into Afon Ieithon , which it joins at N 52° 14′ 20″, W 3° 23′ 16″ at OSM node n332150750, and there 517 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• Arlais Brook, which joins it at N 52° 14′ 16″, W 3° 22′ 52″ at OSM node n332150742, and 294 m of total upstream flows in.
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